Latest Creality's display firmware update breaks compatibility with non stock firmware.

[martinwilco]

Note: Because some links were removed, this is the screen firmware that allows restore display functionality:
Screen firmware.zip

SOLVED: possible solutions were written from here: #966 (comment) but the specific solution depends on your board/display unit. Please read carefully.

Did you test with a precompiled firmware?

Yes, and the problem still exists.

Bug Description

I previously used the professional firmware 20230522, but then switched to the Creality firmware 3.1.9 to test the new model picture preview function.
Downloaded from: https://www.creality.com/pages/download-ender-3-s1
Creality includes a firmware update for the display with the familiar folder "private" and the file "firmware.zlib". Additionally there is a file called "dcboot.bin" that needs to be installed before flashing private and firmware.zlib.
The display works absolutely fine with Creality's firmware 3.1.9

But when flashing the professional firmware 20230522 again, there is no loading bar as usual and the printer does not boot up. It gets stuck on the Creality logo screen. Neither flashing the older firmware "dacai_update.zip" from display assets nor renaming the firmware file helps.
Older display firmware versions from Creality do not work either. A downgrade from "dcboot.bin" is not available.

Bug Timeline

After updating display firmware

Expected behavior

Boot up as usual, firmware flashing with loading bar

Actual behavior

When booting up screen is stuck on Creality logo, the printer cannot be used at all.

Steps to Reproduce

1. Install "dcboot.bin" from Creality firmware 3.1.9 on DACAI display via microSD-card
2. Flash private folder and "firmware.zlib"
3. Try to flash professional firmware 20230522, in my case Ender3S1-F4-20230522B.bin

Version of Professional Firmware

20230522

Printer model

Creality Ender-3 S1

Electronics

V24S1_301, DACAI

Add-ons

No response

Bed Leveling

None

Your Slicer

Cura

Host Software

None

Additional information & file uploads

A fix would be very much appreciated.
Otherwise the only way is to buy a different display to use the professional firmware, since a firmware downgrade does not seem to be available.

Thank you so much for your effort!!

[mriscoc]

Thanks for the warning.
Sorry, it is not a issue with this firmware, you need to report on Creality's Github to request them a way to revert their issue or provide the source code of the changes implemented in such version.

[martinwilco]

Ok thanks for the info. If I am not the only one with this issue, you can maybe also add a warning to your wiki so that others do not make the same mistake:)
Then I will try my luck with Creality's support.

[djcath]

im also unable to flash the firmware, can anyone please let me know if they were able to resolve this.

[Crapkin22]

I found a work around this problem. I asked creality support for older firmware. Flashed it. Then I reinstalled the mriscoc firmware. It worked.
Here is the link to firmware they gave me. https://www.crealitycloud.com/software-firmware/firmware?type=2&keyword=&system=0&subType=618ddf638f5f262859ef2091&hardware=V24S1_301

I used the firmware from 28.10.2022

[djcath]

Was this specifically the printer firmware or was it both display and printer firmware as I plan to try this.
I also found that the latest creality display firmware wouldn’t actually install on my S1 said the file was too large or something.

[Crapkin22]

Here are the steps I did.

1. Flashed latest creality screen and motherboard firmware version 3.1.9 the one with dcboot file for the screen since the 3.2 version didnt work on my printer.. (just to get the printer working).
2. Flash old screen and motherboard firmware, from the link I provided above (file dated 28.10.2022)
3. Flash mriscoc firmware. everything seems to work fine.
   Tried installing the screen firmware for mriscoc for DACAI screen but that still doesnt work (black screen).
   So i went back to old creality screen firmware and it seems to work fine, Menus are all there.

[djcath]

Amazing thanks for this. to add. i read a bit further and saw that my display was TJC (not dacai or Dwin) based on the pics. so i loaded the TJC update (and also put in the DACAI firmware folders too for the hell of it) this updated my screen, then there is a Ender S1 F4 TJC firmware, this seemed to work (release tag is TJC)

[m-roberts]

I can confirm that downgrading to Ender-3 S1_HWv24S1_301_SWV3.0.4_C_F401_FDM_LASER worked to get off of Marlin2.0.8_Ender-3S1_HWv24S1_301_SWV3.1.9_Two_C_F401_FDM_LASER. I was then able to install Ender3S1-F4-UBL-20230522B.bin without issue.

@martinwilco can you update your description to reflect the fact that a downgrade is possible?

Was this specifically the printer firmware or was it both display and printer firmware as I plan to try this. I also found that the latest creality display firmware wouldn’t actually install on my S1 said the file was too large or something.

@djcath according to this Reddit comment, flashing dcboot.bin first before the other files is what is required - this is what I needed to do. However, the professional firmware is definitively better and I recommend using it instead.

[m-roberts]

Tried installing the screen firmware for mriscoc for DACAI screen but that still doesnt work (black screen).
So i went back to old creality screen firmware and it seems to work fine, Menus are all there.

@Crapkin22 I can confirm that this is the case for me too - I didn't actually try and do this until today. However, the Screen Firmware from Ender-3S1_HWv24S1_301_SWV3.0-1.4_C_F401_FDM_LASER is not working for me - I still get a blank display, even though I get "update finished!"

What firmware did you go back to specifically?